[MD WebUI] Fix sidebar selected color.

chrome/browser/resources/settings/settings_menu/settings_menu.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-menu/paper-menu.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-menu/paper-submenu.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-ripple/paper-ripple.html">
 <link rel="import" href="/icons.html">
 <link rel="import" href="/route.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-menu">
   <template>
     <style include="settings-shared">
       #about-menu[about-selected] {
-        color: var(--google-blue-500);
+        color: var(--google-blue-700);
       }
 
       iron-icon {
         --iron-icon-fill-color: var(--settings-nav-grey);
         -webkit-margin-end: 24px;
       }
 
       .iron-selected:not(.menu-trigger) > iron-icon {
-        fill: var(--google-blue-500);
+        fill: var(--google-blue-700);
       }
 
       .menu-trigger span {
         -webkit-margin-end: 16px;
         flex: 1;
       }
 
       paper-menu {
         --paper-menu-selected-item: {
           font-weight: 500;
@@ skipping 22 matching lines @@
         --paper-menu-selected-item: {
           font-weight: 500;
         };
       }
 
       paper-menu div {
         position: relative;  /* Needed for paper-ripple. */
       }
 
       paper-ripple {
-        color: var(--google-blue-500);
+        color: var(--google-blue-700);
         opacity: .5;
       }
 
       .page-menu paper-menu {
         --paper-menu-selected-item: {
-          color: var(--google-blue-500);
+          color: var(--google-blue-700);
           font-weight: 500;
         };
       }
 
       .page-menu div {
         -webkit-padding-start: 24px;
         align-items: center;
         display: flex;
         font-size: 100%;
         font-weight: 500;
@@ skipping 126 matching lines @@
       <paper-submenu class="page-menu">
         <div about-selected$="[[aboutSelected_]]" class="menu-trigger"
             id="about-menu" on-tap="openPage_" data-path="/help">
           $i18n{aboutPageTitle}
         </div>
       </paper-submenu>
     </paper-menu>
   </template>
   <script src="settings_menu.js"></script>
 </dom-module>